Amazon.com : Mind and Action 10" Beach Replacement Balloon Wheels Tires 2-Pack, Cart Tires for Kayak Dolly Canoe Boat Buggy Carrier : Sports & Outdoors
Amazon.com: Bonnlo 16" D X 8" W Balloon Wheels for Axle with 0.78-in Diameter Axle Hole 20mm Beach Sand Tires with Bearings for Homemade Beach Wagon Kayak Trolley Fishing Cart, 2 Pack :
Replacement "Balloon/Beach" tires. Sold in sets of two. Fits Malone MPG521-S, MPG522-S, MPG564-S and MPG576-S carts.